Free Electrons move randomly in a conductor due to attraction of positive charges. So some energy is required to emit electrons from metal surface. Minimum energy is required to emit the electrons on the surface of conductor. This minimum energy …
The Definition of Photo electric effect given in above article. The phenomenon of emission of electrons from a metallic surface by the incidence of light (photons) is known as photoelectric effect. The emitted electrons are called photoelectrons. The below picture …
Hertz, in 1887 discovered the phenomena of photoelectric effect for the first time. He was experimenting on the generation of electromagnetic waves by spark discharge and he noticed that sparks around the detector loop were intensified when ultraviolet radiation fell …
Einstein gave an explanation for photoelectric emission based on the Planck’s quantum theory of light. When light of certain frequency (greater than threshold frequency) incidents on a metallic surface the energy on incident photon (hf) is: Partly used to eject …
The experimental arrangement of Millikan’s method to determine Planck’s constant ‘h’ is shown below. The apparatus consists of an evacuated chamber (vaccum) where different alkali metals are placed on a rotating table so that experiment can be performed for different …
Wave optics is the study of wave nature of a light. It can prove by their two phenomena’s of interference and diffraction. Wave front is defined as surface joining the points of same phase. The speed with which the wave …
Thomas Young first demonstrated interference from light waves with a double slit in 1801. The schematic diagram for this experiment is shown in below The single light source is located at S 0, and the light goes through two very narrow openings …
Light is defined in previous article However, a wave is free to oscillate right and left or up and down or at any angle between the vertical and horizontal. Some kinds of crystals have a special property of polarizing light, meaning that they …
Ledger: Ledger is a book of storing all Business transactions for a particular account in a tabular form such as asset, liability, owner equity, revenue, expense, gain, and loss accounts. And transfer the entries to the respective accounts in the …